LR Summary and LQ PlanJesse Schmalzle
w/ contributions from:
J. Muratore (BNL)
P. Ferracin (LBNL)
October 18, 2007
J. Schmalzle 2October 18, 2007
LR Fabrication
Coil winding: Impregnated coil:
J. Schmalzle 3October 18, 2007
LR Fabrication
Coil reaction:
J. Schmalzle 4October 18, 2007
LR Assembly
Coil assembly:• Coils assembled into LBNL fabricated support fixture
with LBNL assistance.
J. Schmalzle 5October 18, 2007
LR Assembly
Structure lifting / uprighting:
J. Schmalzle 6October 18, 2007
LR Test ResultsLRS01 Quench Locations
0
2000
4000
6000
8000
10000
0 5 10 15 20 25 30
Quench Number
Qu
en
ch
Cu
rre
nt
(A)
Iss = 10600A (4.5K)
20 A/s 50 A/s 100 A/s 50 A
/s20
A/s
20 A
/s10
A/s
20 A
/s5
A/s
Various Locations
Inner Layer High Field (2 places)
Outer Layer
Turns 1-10
Inner Layer mostly high field
Tur
ns 1
-15
Tur
n1-2
LE
S
Inne
r La
yer
Hig
h F
ield
Inne
r La
yer
Hig
h F
ield
Tur
n 1
Tur
n
Turn 1 = pole turnTurn 21 = outermost turn0
2000
4000
6000
8000
10000
0 5 10 15 20 25 30
Upper Inner Layer
Lower Inner Layer
Upper Outer Layer
Iss
J. Muratore
IQ (max) = 91% ISS
J. Schmalzle 7October 18, 2007
LR Test Results
SRS01-LRS01 QUENCH PERFORMANCE
0.5
0.6
0.7
0.8
0.9
1.0
0 1 2 3 4 5 6 7 8 9 10 11 12 13
Quench Number
I /
I ss
LRS01
SRS01
J. Muratore
J. Schmalzle 8October 18, 2007
LR Test Results
LRS01 Ramp Rate Behavior
0
2000
4000
6000
8000
10000
12000
0 20 40 60 80 100
Ramp Rate (A/s)
Qu
en
ch
Cu
rre
nt
(A)
J. Muratore
J. Schmalzle 9October 18, 2007
LR Test Results
LRS01 Heater Quench Delays
0
2
4
6
8
10
12
14
16
0 10 20 30 40 50 60 70 80 90
Heater Current (A)
Del
ay (
ms)
J. Muratore
J. Schmalzle 10October 18, 2007
LR Test Results
LRS01 Number of Spikesin 307.2ms before quench
0
1
2
3
4
5
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
Quench Number
Nu
mb
er o
f S
pik
es
J. Muratore
J. Schmalzle 11October 18, 2007
LR Test ResultsLRS01 Coil Differences with Spikes
-0.8
-0.7
-0.6
-0.5
-0.4
-0.3
-0.2
-0.1
0.1
0.2
0.3
0.4
0.5
0.6
-0.31 -0.26 -0.21 -0.16 -0.11 -0.06 -0.01
Time (s)
Vo
ltag
e (V
)
Q19
Q20
Q21
Q22
Q26
(Flux Jumps)
J. Muratore
J. Schmalzle 12October 18, 2007
LR Test Results
Shell shrinks more than yoke Friction limits the shell
contractions• Central part locked
Strain at 4.5 K consistent with 0.2 friction model results
During excitation e.m. forces induced slippage
Strain gauge measurement and analysis – axial strain
P. Ferracin
J. Schmalzle 13October 18, 2007
LR Test Results
Average of the central gauge measurements
3 cool-downs in total During dummy coil test
• At 77 K- Axial stress of 200 MPa- Azim. stress of 220 MPa
Similar stresses after first LRS01 cool-down
During excitation, sudden z slippage of the shell
• Drop of axial stress• Effect on azimuthal stress
Strain gauge measurement and analysis - axial & azimuthal stress
P. Ferracin
J. Schmalzle 14October 18, 2007
LRS02 Plan
Support structure shipped to LBNL for modification.• Segmented shell:
- Less axial strain- No slippage during excitation- Better control of shell ID- More uniform azimuthal stress
Modified structure and assembly tooling to be returned to BNL.
Reassemble using the original coils.• Attempt to repair spot heaters before reassembly.
Cold test.
J. Schmalzle 15October 18, 2007
LRS02 Status
P. Ferracin
New gauges replaced all old gauges• 5 stations (left-right and T-Z)• Lead end + center of each segment.
Shell cut into four segments.• Pin holes included to align
segments .• Segments misaligned after cut.• Bladder operation will conform
shell ID to yoke OD.
J. Schmalzle 16October 18, 2007
LRS02 Status
P. Ferracin
Status• Structure disassembled• Shell cut in four segments• New instrumentation attached (20 gauges)
Next steps • Measurements of the gauge offsets• Yoke insertion and slight preload of the shell• Dummy coil pack insertion• Ship structure to BNL
J. Schmalzle 17October 18, 2007
LQ Plan
Fabricate two sets of reaction/impregnation fixture to FNAL drawings:• Adapt tooling for use at BNL:
- Use existing assembly table with new standoffs to support fixture.
- Use existing LR beams to lift and flip fixture.- Fabricate coil lead solder fixtures to FNAL drawings.- Add heaters for impregnation in vacuum tank.- Use existing vacuum tank and top plate with modified
hanging brackets for vertical impregnation.
Design and procure instrumentation circuits.
J. Schmalzle 18October 18, 2007
LQ Plan
React and impregnate practice coil:• Coil to be wound and cured at FNAL and shipped to BNL.• Perform electrical checks and visual inspection, then cut up
coil for further inspection.
React and impregnate LQ coils.• Coils to be wound and cured at FNAL and shipped to BNL.
Assemble coils into shell and bladder structure.• Structure and assembly tooling to be fabricated at LBNL.
Ship coils to FNAL in react / impregnation fixture for (later) assembly into collar support structure .
Top Related